I'm working on a 1981 El Camino with a Saginaw 605 steering gear. It leaks from the top, which I understand is not uncommon with this part. I ordered a replacement from an online supplier and they sent me the box with the four bolt retainer (as opposed to the snap-ring type) I think maybe it's a Saginaw 800. They told me that the parts would interchange, but I'm reluctant to go to the trouble of disassembling my steering to find out that it doesn't work. Any experience or advice in this regard would be helpful. Thanks in advance.